Cable car service disrupted on California Street Thursday

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The California cable car line was out of action for most of the day Thursday because of cable problems.

Workers first identified the problem, which is related to the line’s underground cable, about 10:30 a.m.. Buses substituted for trams from until 4:30 p.m., according to San Francisco Municipal Transportation Agency spokeswoman Kristen Holland.

The service disruption was the second to afflict the popular tourist route in a week. Last Friday, service was affected following a morning collision between two trams.